Chapter A.1, Problem 1PE

(a)

To determine

Given the matrix $A=\left[\begin{array}{cc}a& b\\ c& d\end{array}\right]$ , the …………. of A is denoted by det A and is written as $\left[\begin{array}{cc}a& b\\ c& d\end{array}\right]$ . The value of det A is the real number equal to ………

(b)

To determine

Given $3\times 3$ matrix, the …………… of an element in the matrix is the determinants of the $2\times 2$ matrix formed by deleting the row and column in which the e4lement resides.

(c)

To determine

Complete the expression on the right to represent the value of $3\times 3$ determinant shown.